$ git clone -n https://src.fedoraproject.org/rpms/dropbear.git /var/lib/mock/f39-build-1592080-38306/root/chroot_tmpdir/scmroot/dropbear
Cloning into '/var/lib/mock/f39-build-1592080-38306/root/chroot_tmpdir/scmroot/dropbear'...
$ git fetch origin 42af501a709cd01fd5081bf4e2ff86733dacc34a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dropbear
 * [new ref]         42af501a709cd01fd5081bf4e2ff86733dacc34a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42af501 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild